( 18 ) 



holes of this parasite at the time when we were collecting 

 the material. 



" Copulation took place at night : the male flutters over the 

 female for a few seconds and then they unite very quickly. Two 

 nights later eggs were laid. The eggs are numerous and de- 

 posited in rather irregular and straggling batches, but mostly 

 in contact with and adhering to one another. They ai'e obtu.sely 



Fig. 3. 



Transverse section, showing ventral \-iew of anterior end. 

 b. Dome. c. Outer cover. f. Pillars of arches. 



[xliv 

 oval, smooth, shiny, and of a rather pale orange colour. They 

 were laid on the sides of the breeding-jar just above the water, 

 and on wet blotting-paper, but the female never entered the 



h a 



Fig. 4. 



Diagrammatic section through centre of cocoon. 

 h. Dome. c. Outer cover, d. Inner cover, e. Pillai-s. 



water for the purpose of ovipositing, although there were water- 

 plants and algae in the cage. The eggs laid on dry surfaces 

 soon collapsed and dried up, while those on wet surfaces kept 

 in good condition for so long as suitable conditions could be 

 maintained. Unfortunately such conditions could not be 

 maintained on board ship, and all the ova died before we 

 reached Java. 



" The adult moth readily takes to the water when frightened, 

 diving below the surface, and using its legs for swimming. 

 The wings are appressed to the body, and the whole insect 



